What is the cheapest airline that flies from San Juan to London?

JetBlue, TAP AIR PORTUGAL, and United Airlines are the most popular carriers operating from San Juan to London

When did momondo last update prices for flights from San Juan to London?

Prices for flights from San Juan to London refresh daily.

How old do you have to be to fly from San Juan to London?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from San Juan to London.

What documentation or ID do you need to fly to London?

The necessary travel and health documents for your London trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

£231 Cheap Flights from San Juan to London in 2025/26

Q: What is the typical price of a round-trip flight between San Juan and London?

Prices are currently low for flights on this route. Typical prices usually range from £456 to £523. The lowest price recently found on this route was £400.

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Find the cheapest flights from San Juan to London

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One-way

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Cheap return flights

Enter your travel dates to find the best prices.

13:57 - 09:00SJU-LHR

15h 03m1 stop

10:10 - 23:56LHR-SJU

17h 46m1 stop

£400KLM

Find Deal

Sun, 9 Nov - Thu, 20 Nov

17:43 - 11:40SJU-LHR

13h 57m1 stop

10:10 - 00:56LHR-SJU

18h 46m1 stop

£407KLM

Find Deal

Wed, 29 Oct - Fri, 7 Nov

07:00 - 06:55SJU-LHR

19h 55m1 stop

06:20 - 22:18LHR-SJU

19h 58m2 stops

£411Delta

Find Deal

Wed, 4 Mar - Tue, 10 Mar

06:15 - 07:50SJU-LHR

21h 35m1 stop

08:55 - 23:49LHR-SJU

18h 54m1 stop

£412Virgin Atlantic

Find Deal

Sun, 15 Feb - Tue, 24 Feb

17:43 - 11:40SJU-LHR

13h 57m1 stop

08:55 - 22:59LHR-SJU

18h 04m2 stops

£413Delta

Find Deal

Wed, 29 Oct - Tue, 4 Nov

02:05 - 20:35SJU-LHR

14h 30m1 stop

06:50 - 22:22LHR-SJU

19h 32m2 stops

£422United Airlines

Find Deal

Mon, 1 Dec - Wed, 10 Dec

14:10 - 10:50SJU-LHR

16h 40m2 stops

06:50 - 22:22LHR-SJU

19h 32m2 stops

£425United Airlines

Find Deal

Tue, 2 Dec - Wed, 10 Dec

16:49 - 12:05SJU-LHR

15h 16m1 stop

07:35 - 16:35LHR-SJU

13h 00m1 stop

£427American Airlines

Find Deal

Mon, 2 Feb - Wed, 11 Feb

12:55 - 09:00SJU-LGW

16h 05m2 stops

12:30 - 10:10LGW-SJU

25h 40m2 stops

£526American Airlines

Find Deal

Sun, 9 Nov - Thu, 20 Nov

18:36 - 16:35SJU-LCY

17h 59m2 stops

13:45 - 12:58LCY-SJU

27h 13m2 stops

£1,142Virgin Atlantic

Find Deal

Sun, 30 Nov - Sun, 7 Dec

KLM flights from San Juan to London

Our best KLM deals on San Juan to London flight tickets

KLM

9 Nov

SJU13:57San Juan Luis Munoz Marin Intl

15h 03m

1 stop

LHR09:00London Heathrow

20 Nov

LHR10:10London Heathrow

17h 46m

1 stop

SJU23:56San Juan Luis Munoz Marin Intl

£400

Find similar

KLM

29 Oct

SJU17:43San Juan Luis Munoz Marin Intl

13h 57m

1 stop

LHR11:40London Heathrow

7 Nov

LHR10:10London Heathrow

18h 46m

1 stop

SJU00:56San Juan Luis Munoz Marin Intl

£407

Find similar

KLM

3 Nov

SJU14:32San Juan Luis Munoz Marin Intl

22h 03m

2 stops

LCY16:35London City

14 Nov

LCY08:40London City

18h 33m

2 stops

SJU23:13San Juan Luis Munoz Marin Intl

£444

Find similar

Delta flights from San Juan to London

Our best Delta deals on San Juan to London flight tickets

Delta

4 Mar

SJU07:00San Juan Luis Munoz Marin Intl

19h 55m

1 stop

LHR06:55London Heathrow

10 Mar

LHR06:20London Heathrow

19h 58m

2 stops

SJU22:18San Juan Luis Munoz Marin Intl

£411

Find similar

Delta

29 Oct

SJU17:43San Juan Luis Munoz Marin Intl

13h 57m

1 stop

LHR11:40London Heathrow

4 Nov

LHR08:55London Heathrow

18h 04m

2 stops

SJU22:59San Juan Luis Munoz Marin Intl

£413

Find similar

Delta

29 Oct

SJU07:15San Juan Luis Munoz Marin Intl

21h 30m

2 stops

LHR08:45London Heathrow

4 Nov

LHR10:10London Heathrow

18h 46m

1 stop

SJU00:56San Juan Luis Munoz Marin Intl

£414

Find similar

Fly from

Fly to

Route

Depart

Return

Price

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Sun 9/11

13:57-09:00

1 stop15h 03m

London Heathrow

Thu 20/11

10:10-23:56

1 stop17h 46m

£400

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 29/10

17:43-11:40

1 stop13h 57m

London Heathrow

Fri 7/11

10:10-00:56

1 stop18h 46m

£407

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 4/3

07:00-06:55

1 stop19h 55m

London Heathrow

Tue 10/3

06:20-22:18

2 stops19h 58m

£411

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Sun 15/2

06:15-07:50

1 stop21h 35m

London Heathrow

Tue 24/2

08:55-23:49

1 stop18h 54m

£412

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 29/10

17:43-11:40

1 stop13h 57m

London Heathrow

Tue 4/11

08:55-22:59

2 stops18h 04m

£413

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Mon 1/12

02:05-20:35

1 stop14h 30m

London Heathrow

Wed 10/12

06:50-22:22

2 stops19h 32m

£422

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 2/12

14:10-10:50

2 stops16h 40m

London Heathrow

Wed 10/12

06:50-22:22

2 stops19h 32m

£425

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Mon 2/2

16:49-12:05

1 stop15h 16m

London Heathrow

Wed 11/2

07:35-16:35

1 stop13h 00m

£427

San JuanLondon

SJU - LGW

SJULGW

San Juan Luis Munoz Marin Intl

Sun 9/11

12:55-09:00

2 stops16h 05m

London Gatwick

Thu 20/11

12:30-10:10

2 stops25h 40m

£526

San JuanLondon

SJU - LCY

SJULCY

San Juan Luis Munoz Marin Intl

Sun 30/11

18:36-16:35

2 stops17h 59m

London City

Sun 7/12

13:45-12:58

2 stops27h 13m

£1,142

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from San Juan to London

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the typical price of a round-trip flight between San Juan and London?

What is the cheapest month to fly to London?

The cheapest month to fly to London from San Juan is in January. Flight prices, which tend to average around £496, are often lower during this time because this is during the off-season. The month of February is another great option to travel to London, with average flight prices from San Juan averaging around £497.

What is the cheapest day to depart on your flight to London?

Our data shows that Wednesday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £492. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from San Juan to London for around £788.

What is the cheapest time of day to depart on your flight to London?

The cheapest time of day to fly to London is in the afternoon when flights can be purchased for as low as £492. Flights in the morning are often more expensive, with an average ticket price of £852.

How far in advance should I book a flight to London?

You are more likely to see cheaper flights to London from San Juan when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around £612 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from San Juan for as low as £456 on momondo.

Cheap San Juan to London flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from San Juan to London

Direct flights	None

There are no direct flights from San Juan to London. There are no popular flight routes from San Juan to London.

Search flight deals

How far is San Juan to London by plane?
San Juan and London are 4196.4 mi apart from one another. Flights usually cover this in 11h 55m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from San Juan to London?
Prices for flights from San Juan to London refresh daily.
How old do you have to be to fly from San Juan to London?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from San Juan to London.
What documentation or ID do you need to fly to London?
The necessary travel and health documents for your London trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

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Slough

Canterbury

Southend-on-Sea

Ipswich

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Colchester

Dover

Hayes

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Worthing

Dartford

Bedford

Ramsgate

Stansted

Why use momondo?

Why should I use momondo to find a flight deal from San Juan to London?

It is quick and easy to find San Juan to London flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to London that suits you.

Can I find flights from San Juan to London with flexible booking policies on momondo?

momondo does allow users to show only those flights to London from San Juan which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from San Juan to London?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from San Juan to London.

I’m not ready to book a flight from San Juan to London right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of San Juan to London flights. All you need is a valid email address and we will do the rest; it is that quick and easy.